9/6/21 (day 29): Today I stripped away all remaining growth except for the two main shoots themselves. Watered with plain water and adjusted the ties to keep the growth horizontal and attempt to get all 5 plants to the same height.
9/9/21 (day 32): Watering again today, still not adding any nutes yet. I'm letting the shoots grow out a little bit more and then I'll be topping to the third node on each main shoot to continue building the manifold.
9/12/21 (day 35): Topped again today, down to the third node on each shoot. Now there's 4 total shoots per plant, and I'll only be topping one more time. I've had to let the front right plant get a little too tall due to a little split in the stem from bending down a little too much during LST and I wanted to be gentle with it until fully healed. Still not using any nutes, the super soil is completely feeding the plants on its own. There even seems to be very slight nutrient burn, so I don't think I'll be needing to add nutrients for a little while longer.